甘肃省粮食产量时空变化、驱动因子和趋势预测分析

在分析甘肃省粮食产量时空变化的基础上,利用灰色关联分析方法探讨了粮食生产的影响因素,定量分析了粮食产量与影响因素的关联程度,并利用GM(1,1)模型对单产、年末总人口、粮食总产量的变化趋势进行了模拟预测.结果表明:(1)甘肃省粮食产量变化的总体特征为波动中呈上升趋势,各市(自治州)粮食生产变化空间差异性明显;(2) 粮食单产、年末总人口、有效灌溉面积、受灾面积、年末耕地面积和粮食播种面积等是粮食生产的主要驱动因子;(3)模拟预测表明,粮食总产量增长幅度不大,而人口的增长相对较快,因此,在大力发展粮食生产的同时,要适当控制人口数量,促进粮食生产可持续发展 .

Analysis of temporal and spatial variation, driving factors and trend prediction of grain yield in Gansu Province

Based on temporal and spatial variation analysis of grain yield in Gansu Province in the past,the grey correlation analysis method was employed to explore the influential factors of grain yield and analyze quantitatively the degree of correlation between grain yield and its influential factors.The GM(1,1) model was used to simulate and predict the variation trend of yield per unit area,year-end population and total grain yield.The results showed:(1) The grain yield of Gansu Province was increased in fluctua...